Buffer overflow in Internet Explorer VML

1) Buffer overflow

EUVDB-ID: #VU1242

Risk: Critical

CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2007-0024

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to boundary error in Vgx.dll library when handling Vector Markup Language (VML) tags. A remote attacker can create a specially crafted web page, trick the victim into opening it and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in compromise of vulnerable system.

Note: this vulnerability is being actively exploited.

Mitigation

Install update from vendor's website:

• Internet Explorer 5.01 Service Pack 4 on Microsoft Windows 2000 Service Pack 4 — Download the update
• Internet Explorer 6 Service Pack 1 on Microsoft Windows 2000 Service Pack 4 — Download the update
• Windows Internet Explorer 7 on Microsoft Windows XP Service Pack 2 — Download the update
• Windows Internet Explorer 7 on Microsoft Windows XP Professional x64 Edition and Microsoft Windows XP Professional x64 Edition Service Pack 2 — Download the update
• Windows Internet Explorer 7 on Microsoft Windows Server 2003 Service Pack 1 and Microsoft Windows Server 2003 Service Pack 2 — Download the update
• Windows Internet Explorer 7 on Microsoft Windows Server 2003 with SP1 for Itanium-based Systems and Microsoft Windows Server 2003 with SP2 for Itanium-based Systems — Download the update
• Windows Internet Explorer 7 on Microsoft Windows Server 2003 x64 Edition and Microsoft Windows Server 2003 x64 Edition Service Pack 2 — Download the update

Vulnerable software versions

Microsoft Internet Explorer: 5.01 - 7

External links

http://technet.microsoft.com/en-us/library/security/ms07-004.aspx
http://www.kb.cert.org/vuls/id/122084

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.